Attachment for talking-machines.



e. MARTLLoeK.y ATTACHMENT PoR TALKING MAGHTNES. V j APPLIoATToN TILT DB0. 3 1, 1907. l Y 899,880. 7 Patented Sept.29,1908,

Wl TNESSES UNITED i STATES PATENT OFFICE.

y CHARLES `MA.RfrELoo'x,`y or oiiovILLE, CALIFORNIA.' j mracmmm ron -"raLxrNsaisitAcii-nlrns.'A l

- spec'iationpf'necters Patent.

- ratented sept. 29, 1908'.

l applicati@.meanemberen19o?, Seriana-108,809.

4 proved Attachment for Talking-Machines, of

' which the following is a full, clear, `and exact description.

My invention relates to'talkinglinachines', i' my more particular object being to 'providev an attachment for a machine' known conimercially as the 113.I CJ graphophone, Vfor thepu'rpose of increasing the delicacy of adjustment between the record and p needle, and also increasing thegeneraleiciency of the apparatus. y

Reference is to be had to .the accom anying drawings forming a part of this spec' cation,

s inwhich similar characters of reference indi# cate corresponding parts in all the ii'gures.

.Figure 1 is a rear elevation of the grapho'- phone provided .with my attachment, this' view showing the stylus needle, the weighted lever supporting the same, means fortensioning the' ever, and l'also showing the pawl for v raising the stylus out `of engagement with the Vsound record; and Fig.` 2 is an enlarged side elevation of the graphophone, parts being in section, and showing the drag shoe for actuating the diaphragm, the'friction wheel engagingthe drag shoe, the stylus needle and accompanying parts-'for tensionin the drag atively to the friction whee showing fthe pivotally mountedweight for supporting the stylus needle and its accompanying parts.- Fig. 3 is a fragmentary perspective showing how, 1 at afpredeterminedthe stylus point in` the. travel of 'the carriagle, is raised out of engagement wit the record. The casing ofthe machine is shownat 4 and at 5 is a main driving :pulley actuated by abelt 6. A main driving 'shaft yis shown at 7 and a revoluble mandrel at 8.` A sound recordv 9 is mounted upon .the mandrel in theV usual manner. Mounted upon the main shaft 7 'is a gear wheel 10 which meshes ,with another gear Wheel 11, and the latter meshes with a' third gear wheel 12. These gear wheels are mounted in a box 13 integralwith the casing, and extending laterally from this A box is a stationaryV lsleeve 14.` A tubularshaft 15 is connected with the gear wheel 12 and extends'through thebearin sleeve `14, and telescopically mounted within the tubular sleeve 15 is another tubular `sleeve 1 6,

the; stylus A and through 'the latterfextends a revoluble "shaft;17. Y Y

Mounted loosely upon the revoluble shaft .'17fis a collar 18,4 and'engaging the latter is a leaf spring 19., 'Beyond the collar 18'the Shaft 17 is provided with a removable cap 18%. lA spiral sprin 20 engages an eye 21 integral withthe clar 18. A lever 22` is rovided with abend 22-, and is 'dis osed below the shaft .17, and connected Wit ythe bend 22a of the lever 2 2'is a spiral spring 23. A pin-124, su ports a weight 25 having substantiallya ozenge shape, andthe lower end 26` ofthis weight is pointed, as indicatedin Fig. 2; VIntegral with the weight 25; and

extending horizontally'ltherefrom is an' arm,

27 providedwith slots 28, 29. A- pin-30 extends across the slot 29 and supports af stylus needle 31', the latter` being provided Wlth ajewel 32 made preferably of sapphire.

The stylus' needle 31 is provided with av fork 33, and extending through this fork is a bar 34 Vconnected toj'the fork by aid offa' pivot 'pin 35, see Fig. 3. The bar 34 is provided with lan eye 36 and projecting through" this `eye is a spring 37 made preferably f' a single ieee of plain wire. "Ihisspring'isll secure to pins 38 mounted u on ablock 39, the latter being heldn rigid y by aid of `pins/10,41. The pin 40 serves, moreover,A as a pivot pin for supporting one end of the lever 22, as will be understood from Fig. 1.

The sound box is shown at 42l and is pr0 -vided lwith a neck 43 for receiving-thenhorn of the graphophone. A diaphragm bar 44 extends fromV the diaphra m (not shown) within the sound box, tot e drag shoe 45. This dra shoe is made of soft rubber and connected withA its lower end is another drag shoe 46provided with a tongue 47, the latter being secured by a pivot pin 48 to the drag shoe 45. The drag shoe 46 is pi-voted to the bar 34, as. shown inFigs. 2 and 3. Thetwo drag shoes 45, 4.6 together constil tute a composite semicircular member which artially encircles a friction wheel 49. This riction wheel is provided with `flan es 50 upon opposite sidesofthe dra shoes or the purpose of maintaining the at'ter` in true position. l y v A bracket 51l extends directly outward from the sound box and a link 52 is mounted by aid of a pivot pin 52.upon the bracket 51. The link 52 partially supports the revoluble shaft 17, and interpose between the link 52 and the bracket `51 is a Washer 53. The pin 52a is provided with a head 54 having a considera le bearing surface engagin the bracket V51, which bracket is provi ed with a plate 55` secured by screws-4 56 directly to the sound box, forthe urpose of supporting the bracket 51. This racket is also provided with an opening 57 throu h which extends a sleeve' 17 a encircling t e shaft 17 and rotating with it, the` urpose of this sleeve being to form a suitab e bearing for supporting the various revoluble parts carrie by the shaft.

Lugs 58, 59 are disposed upon opposite sides of the weight 25 for the purpose `of supporting the latter, the ivot pin 2,4 exten in from one of these ugs to the other.

yA paw 60 having an lshape is mounted u on the framework and partially within t e path of travel ofthe arm 27. Art 61 is shown a supporting sleeve which is provided at its bottom with a slot 6 2. A carriage 63 is slidably mounted upon the sleeve 61 and is provided with af guide 64 carried by a guide arm 64a. 'A thumb lever 65 is journaled upon the sleeve 61 and is mounted within a slot 68 of the carriage. A cam 66 is connected integrally with the thumb levery 65 and when the latter is turned, the cam is brought into engagement with the lweight 26 so as "to turn the latter upon the pivot pin 24 as a center.. A feed screw shown at 67 and extending through the sleeve 61 operates to propel the carriage 63 in the general longitudinal direction of the feed screw in the manner wellnnderstood in this art. Y Y f -When the device above described is in action, thecarriage 63 travels lalong the sleeve 61. Whenever the ,carriage is in proper position for the pawl 60 to engage the arm 27, the stylus needle 31 is raised so that the ewel 32 is out of engagement with the soun record4 9. This is to prevent the production of harsh and meaningless sounds. due to the ro-v tation of the sound record when blank portions of the record are adjacent to thestylus needle. The leaf spring 19 pressed at all times gently against the collar 18 and ,the tension of the spring 19 against this collar, taken in connection withl the pulling tension of the spring 20, 'also upon it, causes the collar 18 to occupy as nearly as racticable an exact workingl relation towar the revoluble shaft 17. That is to say, the collar 1 8 is maintained in such position relatively to the shaft 17 as to reduce to a minimum the lost motion between these parts. The lever 22 being ulled downwardly by the spiral sprin 23 an this spiral spring being connecte with the weight25, it follows that `the'vveight 25 must exert a tension upon the spring 23 and'consequentl'y upon the spring 20. These springs 2() and23, by pulling u on the upper en d of -the Weight 25, tend to ower the arm -ways ke t taut.

ypin 24 as 27 and thus press the stylus needle gently toward the sound record, so as to secure a proper engagement between the record and the jewel 32. The stylus needle is thus allowed considerable freedom of movement and its adjustment relatively to the sound record is such that the vitality and purity of the tones and notes are greatly romoted.

It will be observe that throughout the device above described the factor of lost motion is reduced to a minimum. The jewel 32 necessarily fitsI against the sound record because of the tension upon the stylus needle 31. The spring 37, by pulling downwardly upon the bar 34, causes its pivota connection with the stylus needle to transmit movements of the latter without loss of motion. in other words, there is a positive connection between the lower end of the bar 34 and the stylus needle. The slices 46 and 45, by virtue of the frictional tension produced by the rotating wheel 49, are al- The net result is that from the'jewe `32 throughout the entire chain of arts up to thediaphragm bar 44 there is no oss of motion whatever, and yet all this is accomplished'without necessity for anly undue pressure upon the sound record. t will be further noted that the pivotal support for the stylus needle is itself movable for the reason that the weight 25 is adapted to rock upon the pivot in 24. Such bem@ the case, it follows that the stylus needle Blflias a double movement to one swinging movement upon the pivot pin 30 as a center, and another swinging movement upon the pivot center, this last-mentioned move'- ment bein usually greater than the swinging movement upon the in 30. The great freedom of movement al owed to the stylus needle, l find in practice improves to a Great extent the purity and quantity of the tones produced.

The operation of my device is as follows: The motion beine' communicated by the belt 6 throughthe driving ulley 5, and the various gears 10, 11 12, t e mandrel 8 and the sound record 9 are rotated. 'At the time when this occurs, the carriage moves along the tubular sleeve 61 in the manner well understoo'd in this art, the revoluble shaft 17 moving telescopically in relation to its supports. The jewel 32 follows the sound groove and transmits avibratory movement. This vibratory movement is not transmitted immediately t0 the diaphragm, but rather to the drag shoes 46, 45, in such manner as to increase and decrease the cohesion thereof relatively to the wheel 49. As in similar machines heretofore used, the motion of the diaphragm is in a measure produced by the rotation of the wheel 49, the vibratory impulses merelyeontrollingl the adhesion of the rag shoes upon the w eel. The movable parts being in motion as above described the Weight 25 and the varioussrings 20, 23 perv15 other spring connected with said lever, a

rocking member connected Withmsaid lastmentioned spring, a stylus lever pivotally mounted u on said rocking member and adapted to e moved by a sound record, a drag shoe engaging said friction member, and 20 a connection-from said stylus lever to said drag shoe.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES MARTELOCK.

Witnesses:

J. A. TYLER, C. D. BRANDT. 

